assertFalse(queryCommand.isSearchField(null));
    }

    /**
     * Test isSearchField() with empty search field set.
     */
    @Test
    public void test_isSearchField_withEmptySet() {
        queryFieldConfig.setSearchFields(new String[] {});

        assertFalse(queryCommand.isSearchField("title"));
        assertFalse(queryCommand.isSearchField("content"));